In climbers with AMS, OCT was able to detect subtle increases in the peripapillary RNFL thickness and in some ONH measurements, even in absence of HACE and papilledema. These changes might be a sensitive parameter in physiologic acclimatization and in the pathogenesis of AMS.

A common firm vitreous adhesion at the obstruction site is reported herein, pointing out the possible role of vitreovascular traction in the etiology of some cases of BRVO. Likewise, although not all BRVO cases can be explained by this pathogenic mechanism, an attached posterior vitreous cortex might be a cofactor in the origin of this entity.

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Purpose To determine the prevalence of vitreovascular traction at the obstruction site in patients diagnosed with branch retinal vein occlusion (BRVO). Methods In this prospective observational case‐control study thirty‐two consecutive cases of BRVO were studied with spectral‐domain optical coherence tomography (SD‐OCT) to detect the presence of vitreovascular traction or vitreous adhesión at the occlusion site. The fellow eye was used as control. Results SD‐OCT directed to the occlusion site revealed a vitreovascular traction in eight eyes (25%). In fourteen eyes (43.75%) an adherent posterior hyaloid without signs of traction was found. Regarding to the same vessel segment of the fellow eye, none of the controls revealed vitreovascular traction, while vitreous adherence was present in 12 (37.5%). Vitreovascular traction at the occlusion site was significantly associated with BRVO (p=0.024, Chi‐squared test). Conclusion Vitreous traction at the occlusion site could play a role in the etiology of some cases of BRVO.

Purpose Present study compared the choroidal thickness in patients with diabetic macular edema (DME) with that in healthy controls to know the true role of choroids in DME. Methods Twelve eyes of 9 patients with DME (65.5±8.4 years), 9 contralateral eyes without DME (60.2±13.7 years), and 186 eyes of 96 age‐matched healthy volunteers (62.1±19.4 years) underwent enhanced depth imaging (EDI) spectral‐domain optical coherence tomography with a Heidelberg Spectralis HRA+OCT. Results Reliable measurements of choroidal thickness were obtained in 72.3% of eyes examined. In the DME group the mean choroidal thicknesses were 232.4±74.7 µm at the fovea, 223.3±70.0 µm nasally, and 234.0±72.9 µm temporally. In the contralateral eyes these measurements were 279.9±103.6 µm, 252.8±86.4 µm, and 283.9±101.4 µm, respectively. Finally, the control group showed slightly higher values: 288.6±114.5 µm, 279.1±112.7 µm, and 283.8±104.3 µm, respectively. However, choroidal thickness did not show any statistically significant differences among the three groups of eyes (p>0.05, ANOVA test). Conclusion Although a decreased choroidal thickness has been reported in eyes with DME, no differences were found in present study when age was counted as a confounding variable. Age has a strong inverse relationship with choroidal thickness.